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package sample;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.image.PixelWriter;
import javafx.scene.layout.BorderPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class _globe extends Application {
public static void main(String... args) {
Application.launch(args);
}
private static final int VIEW_W = 400, VIEW_H = 300;
private static final int MAP_L = VIEW_H / 2, PITCH = VIEW_H / 10;
@Override
public void start(Stage stage) throws Exception {
BorderPane pane = new BorderPane();
Scene scene = new Scene(pane);
stage.setScene(scene);
Canvas view = new Canvas(VIEW_W, VIEW_H);
pane.setCenter(view);
PixelWriter pw = view.getGraphicsContext2D().getPixelWriter();
int[][] map = new int[MAP_L][MAP_L];
for (int y = 0; y < MAP_L; y++) {
double h = 1 - ((y + 0.5) / MAP_L);
double r = Math.sqrt(1 - h * h);
for (int x = 0; x < MAP_L; x++) {
double t = 1 - ((x + 0.5) / MAP_L);
map[y][x] = (t > r) ? -1 :
(int)((1 - Math.asin(t / r) / (Math.PI / 2)) *
MAP_L);
}
}
for (int y = 0; y < 2 * MAP_L; y++) {
int map_y = (y < MAP_L) ? y : 2 * MAP_L - y - 1;
for (int x = 0; x < 2 * MAP_L; x++) {
int map_x = (x < MAP_L) ? x : 2 * MAP_L - x - 1;
int img_x = map[map_y][map_x];
if (img_x == -1) continue;
if (x >= MAP_L) img_x = 2 * MAP_L - img_x;
pw.setColor(x + 50, y,
(img_x / PITCH % 2 != y / PITCH % 2) ?
Color.BLACK : Color.TRANSPARENT);
}
}
stage.show();
}
}